Question

O masina incepe sa franeze in momentul cand are viteza de 90 km/h, avand acceleratia -8m/s^2.In cat timp se opreste si ce distanta parcurge?

Answer 1

Răspuns:

v0=90km/h=90000m/3600s=25m/s

a=-8m/s^2

v=0

t,d=?

v=v0+at--->0=25-8t--->-8t=-25--->t=3,125s

v^2=v0^2+2ad--->0=625-16d-->-16d=-625--->d=39,0625m